properly handle return codes

[odhcp6c.git] / src / odhcp6c.c

diff --git a/src/odhcp6c.c b/src/odhcp6c.c
index a37de913a7c722a2ed11e110428a0d93d5c57374..dce1e0ee7494a3893df9ebef0625d75b7c042bcb 100644 (file)
--- a/src/odhcp6c.c
+++ b/src/odhcp6c.c
@@ -429,7 +429,7 @@ static int usage(void)
        "       -F              Force IPv6-Prefix\n"
        "       -V <class>      Set vendor-class option (base-16 encoded)\n"
        "       -u <user-class> Set user-class option string\n"
-       "       -c <clientid>   Override client-ID (base-16 encoded)\n"
+       "       -c <clientid>   Override client-ID (base-16 encoded 16-bit type + value)\n"
        "       -i <iface-id>   Use a custom interface identifier for RA handling\n"
        "       -r <options>    Options to be requested (comma-separated)\n"
        "       -R              Do not request any options except those specified with -r\n"
@@ -445,7 +445,7 @@ static int usage(void)
        "       -e              Write logmessages to stderr\n"
        "       -v              Increase logging verbosity\n"
        "       -h              Show this help\n\n";
-       write(STDERR_FILENO, buf, sizeof(buf));
+       fputs(buf, stderr);
        return 1;
 }
 
@@ -654,9 +654,9 @@ uint32_t odhcp6c_elapsed(void)
 }
 
 
-void odhcp6c_random(void *buf, size_t len)
+int odhcp6c_random(void *buf, size_t len)
 {
-       read(urandom_fd, buf, len);
+       return read(urandom_fd, buf, len);
 }
 
 bool odhcp6c_is_bound(void)